0026-1742 0026-1742 S0026-17422020000500003 10.22201/fm.24484865e.2020.63.5.01 00 10 2020 00 10 2020 63 5 3 5 1 National Center for Immunization and Respiratory Diseases (NCIRD) 2020 2 Milenio Digital 2020 3 2020 4 2020 5 2019 62 3-5 6 2020 7 2020 8 2020 9 2020 10